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What is a star? ig ball of gas & nuclear fus
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Page 1: What is a star? A big ball of gas & nuclear fusion.

What is a star?

A big ball of gas & nuclear fusion

Page 2: What is a star? A big ball of gas & nuclear fusion.

• Nuclear fusion is the explosion of energy when atoms combine.

** Intense gravity fuses Hydrogen into Helium

Page 3: What is a star? A big ball of gas & nuclear fusion.

Man made nuclear fusion

Page 4: What is a star? A big ball of gas & nuclear fusion.

Star sizes

Page 5: What is a star? A big ball of gas & nuclear fusion.

• The color of stars indicates the temperature of stars

- blue is hottest

- red is coolest

Page 6: What is a star? A big ball of gas & nuclear fusion.

Binary star system is a star system with two stars

Page 7: What is a star? A big ball of gas & nuclear fusion.

A scatter scatter graph that shows the relationshipbetween star’s absolute magnitudes and temperature of the stars. *** Known as a H-R Diagram

Page 8: What is a star? A big ball of gas & nuclear fusion.

The Sun

Page 9: What is a star? A big ball of gas & nuclear fusion.

The Sun• Is a middle size class G star.

Page 10: What is a star? A big ball of gas & nuclear fusion.

Sun spots• Areas of the sun where the gas is cooler.

Page 11: What is a star? A big ball of gas & nuclear fusion.

Coronal Mass Ejections• Large amounts of electrically charged gas are ejected suddenly from the Sun’s corona.

• Can cause disruption in satellite transmissions or even shut down all electro-magnetics.

Page 12: What is a star? A big ball of gas & nuclear fusion.

Solar flares

•Explosion of gas from the Sun’s surface

Page 13: What is a star? A big ball of gas & nuclear fusion.

Solar prominences•Loops of gas connecting sun spots.

Page 14: What is a star? A big ball of gas & nuclear fusion.

Birth of stars

•The gas and dust are pressed together until nuclear fusion occurs.

•Stars are born when the dust and gas of a NEBULA are pulled together by gravity.

Page 15: What is a star? A big ball of gas & nuclear fusion.

Proto star

• The earliest stage of a star.(Baby star)

Page 16: What is a star? A big ball of gas & nuclear fusion.

Nebula

•Stellar cloud of gas and dust.

•The birthplace of stars

Page 17: What is a star? A big ball of gas & nuclear fusion.

Birth of stars

Page 18: What is a star? A big ball of gas & nuclear fusion.

Star death•A star dies when it runs out of fuel

Page 19: What is a star? A big ball of gas & nuclear fusion.

How long a star lives depends on the amount of mass it has.

• Big stars burn fuel faster

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• A light year is the distance light travels in one year.

is measured In light years.

Stars distance

Page 21: What is a star? A big ball of gas & nuclear fusion.

How can we measure star distances?

Page 22: What is a star? A big ball of gas & nuclear fusion.

Parallax

•The apparent movement of stars

•Based on the change in Earth’s position

• Uses the principle of triangulation.

Page 23: What is a star? A big ball of gas & nuclear fusion.

Apparent magnitude• How bright a star appears to be

Page 24: What is a star? A big ball of gas & nuclear fusion.

Absolute magnitude

• How bright a star actually is.

Page 25: What is a star? A big ball of gas & nuclear fusion.

Fate of Stare

Page 26: What is a star? A big ball of gas & nuclear fusion.

•Small and middle size stars expand out into red giants and then shrink into a White dwarf

Page 27: What is a star? A big ball of gas & nuclear fusion.

•A white dwarf is a very small and cool, formed when middle size stars die

Page 28: What is a star? A big ball of gas & nuclear fusion.

Giants and super giants can blow up into a supernova•An exploding star

Page 29: What is a star? A big ball of gas & nuclear fusion.

The remains of a supernova can become either a neutron star or a black hole

Page 30: What is a star? A big ball of gas & nuclear fusion.

Neutron star• Dense remains of a super nova that is smaller than a white dwarf

Page 31: What is a star? A big ball of gas & nuclear fusion.

Black hole•A dense area of space where gravity is so strong that everything is sucked into it.

Page 32: What is a star? A big ball of gas & nuclear fusion.

Our suns will expand out into a red giant and then collapse into a white dwarf.

Page 33: What is a star? A big ball of gas & nuclear fusion.

Constellations

The arrangement of stars in patterns

Page 34: What is a star? A big ball of gas & nuclear fusion.

Galaxies•A massive cluster of stars

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Types of Galaxies

Page 36: What is a star? A big ball of gas & nuclear fusion.

Shaped like a spinning pinwheelChart designation:"S" to stand for spiral galaxies

Spiral

Page 37: What is a star? A big ball of gas & nuclear fusion.

Barred Spiral Galaxy

A spiral with a solid bar across the center.

Chart designation:"SB" to stand for barred spirals.

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elliptical

Shaped like an oval disk

Chart designation:"E" to stand for elliptical galaxies.

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Irregular

No definite shape    Galaxies that can't be classified as either spiral or elliptical are called irregular galaxies.

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•Our galaxy is the Milky Way

•The Milky Way is a spiral galaxy

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History of the universeThe universe is said to have begun with the Big bang

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Big Bang Theory• All matter blow out from a beginning point

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The universe is continuing to expand

Page 46: What is a star? A big ball of gas & nuclear fusion.

It is thought that the universe will collapse into nothingness